6. Thermodynamics question bank (Chemistry)

Using the Gibbs energy change, ΔG° = +63.3 kJ/mol, for the following reaction:  

Agâ‚‚CO₃ ⇌ 2Ag⁺(aq) + CO₃²â»(aq)  

The Kₛₚ of Agâ‚‚CO₃(s) in water at 25°C is:  
(R = 8.314 J K⁻¹ mol⁻¹)  

For the reaction:  
Xâ‚‚Oâ‚„(â„“) → 2XOâ‚‚(g)  
ΔU = 2.1 kcal, ΔS = 20 cal K⁻¹ at 300 K  

Hence, ΔG is: